1. Department of Surgery, Technische Universität München, Ismaninger Strasse 22, 81675 Munich, Germany
2. Department of Surgery, University of Heidelberg, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany
3. Department of Surgery, Koc University School of Medicine, Rumelifeneri Yolu, Sariyer, 34450 Istanbul, Turkey
4. Department of Internal Medicine, Technische Universität München, Ismaninger Strasse 22, 81675 Munich, Germany
5. Institute of Pathology, Technische Universität München, Ismaninger Strasse 22, 81675 Munich, Germany
6. Institute of Pathology, Medical University of Innsbruck, Muellerstrasse 44, 6020 Innsbruck, Austria